What is the query you get the the trace?
You cannot change the Team Detail because that is an object view.
Your options are to create a new portlet either based on Team allocations of a query.
If you base it on Team allocations that will automatically take the system slices for the timescaled fields. The system slices are not user configurable and will not display two years of data.
See
Resource Planning>Allocations>Weekly Details - Time Scale Values - ISSUES
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With a query based portlet you can use the user configurable timeslices and can configure them to cover the required time range if your hardware performance can handle that.
The query would be something like in thread
Team Details Records
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SELECT s.slice_date period, p.id prjID, p.code prjCode, t.prresourceid rscID, t.team_uid rscCode, t.prroleid rscRoleID, s.slice hrs FROM prj_blb_slicerequests pbs, prj_blb_slices s, prteam t, inv_investments p WHERE pbs.field = 4 AND s.slice_request_id = pbs.id AND s.prj_object_id = t.prid AND t.prprojectid = p.id AND s.slice_date >= TO_DATE('20090101','yyyyMMdd') AND s.slice_date pbs.request_name = 'MONTHLYRESOURCEALLOCCURVE'
for each column.
There are examples in
How to build custom grid portlet with time-scaled values?
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and at the end a way to get the column labels, too.
Martti K.