How should Quick Entry in GL work ? 2.1RC

I find the following behaviour, and am unsure if this is what was intended.

Create 2 Quick entries for journal entries,
Quick Entry 1
Base Amount £200
Put in Taxes included, reduce base
Remainder to some GL account

Quick Entry 2
Base Amount £300
Put in Taxes included, reduce base
Remainder to some GL account

If one now goes to the journal entry page the 2 quick entries are in the drop down.. so far so good.

HOWEVER...
The input field to the right of this ( base amount ) shows the first quick entry - £200 and doesn't change if the second quick entry is chosen.

If amount is chosen in the Quick Entry setup it appears the tax calculation uses the input field on the journal entry page whilst the amount itself is taken from that entered  when setting up the quick entry fields... This appears to be a serious bear trap for the unwary user....

I suspect that this needs a javascript function to change the input field when the drop down changes...

I had expected the situation to function like this...