Two abstract numbers for same area?

Hi again,

This is pertaining to C-18, Section 9 in Reeves County.

When I look on the Railroad Commission GIS map the area in question is shown with one abstract number (3608).

When I look on the Texas General Land Office GIS web site it shows the same area as

abstract number 3600.

When I search for AB-3600 in the RRC data base it says there is nothing for that number but 3608 comes up.

When I search the GLO database, there is nothing for 3608 but info for 3600.

The map shows the same area for both. Is this possible or is there an error somewhere?

I started looking this up as we are being asked for an easement.

Any insight would be appreciated.

Thank you,

Mary Bell