developer fields not updated in GC with new app versions

hi,
i have observed an issue with apps using developer fields.
it seems that the layout in GC only is changed the first time i upload the app. with layout, i mean, how many charts, interval & session values are there. and which are their labels.

the first time i uploaded the app i had three charts, two lap values and three session values.
since then, i have removed & added some fields, and i have renamed field names, labels, etc.

but GC will not change names, and will display newer charts using old ones. it is quite chaotic to find out, which chart displays which field. values are OK, though.

this is a DO NOT APPROVE app. i do not now, if this is working fine with already released apps.

is this known?