Update chem_simulator.dm

bugfixes

code/modules/reagents/chemistry_machinery/chem_simulator.dm

@@ -265,6 +265,7 @@
 					to_chat(usr, SPAN_WARNING("The [src] makes a suspicious wail."))
 					return
 		if("select_reference_property")
+			update_costs()
 			if(!reference)
 				return
 			for(var/datum/chem_property/reference_prop in reference.data.properties)
@@ -556,6 +557,9 @@
 				if(target_property.level >= GLOB.chemical_data.clearance_level*TECHTREE_LEVEL_MULTIPLIER + 2 && GLOB.chemical_data.clearance_level < 5)
 					status_bar = "CLEARANCE INSUFFICIENT FOR AMPLIFICATION"
 					return FALSE
+				if(target_property.level >= target_property.max_level)
+					status_bar = "PROPERTY CANNOT BE AMPLIFIED FURTHER"
+					return FALSE
 		else
 			status_bar = "TARGET NOT SELECTED"
 			return FALSE