EL does not support it, no. It’ll always be the first method of the Class#getMethods() array whose name (and amount of arguments) matches the EL method call. Whether it returns the same method everytime or not depends on the JVM make/version used. Perhaps you made a Java SE upgrade in the meanwhile as well. The javadoc even says this:
The elements in the array returned are not sorted and are not in any particular order.
You should not rely on unspecified behaviour. Give them a different name.