Multipeak Fitting 2 Not Fitting Within Graph Cursors

Igor Pro 8.0.4 64-Bit

Windows 10 64-Bit

Hello,

I am trying to fit multiple Gaussian peaks to a graph, adding graph cursors to points on the graph of intereest, and checking the "Use Graph Cursors" box before clicking "Auto-locate peaks now". However, the program instead fits all visible peaks beyond the range of the cursors (see a couple of attached figures for an example of what I mean).

For example, looking at MultipeakFit_Set1.jpeg, I want to fit 5 peaks in the range of 855 to 878 on the x-axis. I place my cursors at those points on the graph, open Multipkeak Fitting 2, and click use graph cursors. However, the program instead auto-locates peaks in the visible range (~850 to ~880). MultipeakFit_Set2.jpg shows the same issue, but just on an expanded x-axis. When I set the phyisal x-axis to 855.5 - 878.5, the fit works as expected. However, this workaround is time-consuming and laborious to do for 1000's of data sets. 

I have previously been able to perform this in previous version of Igor Pro 8 (though I am unsure which version I have used to have performed fitting as expected).

Any ideas on whether this issue is a bug that can be resolved?