I am getting Tempo instead of Base

I had same question as you. How old are you, and what is your Max HR or Threshold heart rate?

There are some mis-match between the "Time in zone and the table", I dont know about that, but normally as I see (my friend also), seem like it is not only based on Heart rate to evaluate the Tempo or base, it is also use "Power". And other thing, although zone 3 of you is 152-163, but as I saw from my activity, if it is too close to the max value of zone 3, then that workout very easy to be laid in "Tempo". If you run around or less than 150, for sure, it will be BASE for your case. 

I think this is because of the determine of "GRAY ZONE"

while running I was checking one of the data screens where I have a HR Gauge and it was all the times either Blue or Green and never jumped into Orange. So, how to you explain that ?

I am 36 and my THR 172 bpm

I think you has same issues with me and most of person for confusing.

I am 40 years old, LTHR is 166, pace 5.15 normally HR = 145.

My zone 3 is from 144-155. So, if I run most of time over 151, then Garmin said I am in TEMPO. So, it is depend on heart rate, foot power, the static of your health... and duration of the workout...

But if I train about pace 5.15, HR around 145 (less than 150), for sure, with 2 hours, it is still BASE.

But if I spend about 30-40% of HR over 150, then it is tempo.

I am not really understand, but I just know how to adjust. 

I guess close to max of Zone 3 will be GRAY ZONE. 

There is no direct relation between HR Zones and the logged Training Effect. HR Zones are merely there for your convenience, but otherwise Garmin uses primarily the HR, HRV, Resting HR, Max HR, LTHR, respiratory rate, and the effort structure and timing for determining the TE.

You can read more details about it, in the article What Is the Training Effect Feature on My Garmin Device? | Garmin Customer Support. Especially pay attention to the table with examples - it may help you understanding the feature better. Concluding from your description, the examples seem to match well with the TE you are getting, I'd tell.

Read up there, HR zones do affect the training effect outcome:

"Your Garmin device will report the most accurate Training Effect when your maximum heart rate and your heart rate zones are configured correctly. "
support.garmin.com/.../

thanks for the answer, I guess it almost clears things out however I still have 1x more piece to solve the puzzle 

So, wearing my HRM pro +, I did a LTHR test and my result was 172 bpm. I set my Heart Rate Zones based on %LTHR and the values are:

Warm Up Z1 (65-79%)

Easy Z2 (80-88%)

Aerobic Z3 (89-94%)

Threshold Z4 (95-99%)

Maximum (100-111%)

So, taking in acount the 172 bpm result from LTHR, I have the following values:

However when checking this our in Heart Rate Zones, I get these totally different zones:

95-113 bpm for warm up z1 as opposed to 112-136 bpm

114-131 bpm for easy z2 as opposed to 138-151 bpm 

132-152 bpm for Aerobic z3 as opposed to 153-162 bpm 

153-171 bpm for Threshold z4 as opposed to 163 - 170 bpm 

172-191 bpm for MAX 

My issue in essence is that I am getting the readings about my heart rate, I have my heart rate zone set correctly but at the end of the exercise, the watch registers different Heart Rate Zones. I am not talking about training effect, only heart rate zones. 

thanks for the answer, I guess it almost clears things out however I still have 1x more piece to solve the puzzle 

So, wearing my HRM pro +, I did a LTHR test and my result was 172 bpm. I set my Heart Rate Zones based on %LTHR and the values are:

Warm Up Z1 (65-79%)

Easy Z2 (80-88%)

Aerobic Z3 (89-94%)

Threshold Z4 (95-99%)

Maximum (100-111%)

So, taking in acount the 172 bpm result from LTHR, I have the following values:

However when checking this our in Heart Rate Zones, I get these totally different zones:

95-113 bpm for warm up z1 as opposed to 112-136 bpm

114-131 bpm for easy z2 as opposed to 138-151 bpm 

132-152 bpm for Aerobic z3 as opposed to 153-162 bpm 

153-171 bpm for Threshold z4 as opposed to 163 - 170 bpm 

172-191 bpm for MAX 

hmaier said:

I have my heart rate zone set correctly but at the end of the exercise, the watch registers different Heart Rate Zones.

There are up to four different HR Zones tables. A general one, and then separate tables for Running, Cycling, and Swimming. Be sure to have them all set accordingly to match your needs.

general is set the same as for Running. Both based on %LTHR with the above values but still at the end of an activity the Heart Rate Zones are skewed