Olympus 60mm Macro soft at infinity focus?

I have a question for owners of the 60 macro. As a macro lens, I have no complaints, but when shooting it as a normal landscape lens, I have found it to be soft at infinity. I just did a test between the Olympus 40-150 and 60mm. Both lenses were on a tripod, no IS, both lenses set at f5.6. Both crops are from the center of the frame. Corners were better on the 60. Have any of you seen this, or do I have a bad lens? I haven't tried with manual focusing, but it showed focus lock on both lenses. The first image is the 40-150, the second is the 60mm. Also, I did the same comparison with the 45mm 1.8 and it was noticeable sharper than both the 40-150 and 60mm.

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This was shot across the street, with the focus box on the sign. Even so, with the 60 set at infinity, shouldn't the sharpness be equal anywhere from about 10'-infinity? The yellow support in the foreground is really about 60' from me and the sign is maybe 100'. This is a small crop from the center of the frame.

 

Evidently, I don't know how to use a camera... I tried again today and the results were much different with the 60mm. It was very sharp with MF and since I didn't overexpose it, it was very nice color and detail. It still is very close to the 40-150, but it does have a margin, especially away from the center of the frame. It just reminds me how amazing that plastic 40-150 is in the right environment. Thanks for the input.

 

I did try it at 2.8 and it was noticeably sharper at 5.6. It wasn't bad at 2.8, but definitely improves across the frame at 5.6.