EXECSTR failure if you alias 'tail'

For the life of me.... I was trying to figure out how having my alises loaded was creating a failure with %@EXECSTR[-2,dirhistory] which returns the 2nd to last folders you were in.

It turns out that me aliasing tail to `call tail.bat` breaks EXECSTR's functionality

Is the implication here that EXECSTR is somehow using tail??
Or an internal tail command which needs an asterisk before it?

Or that we can't realias our tail command?

[History: I have compiled non-cygwin EXEs...

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